From c343566407755f9eb65e10b6a4dfe165a28330b6 Mon Sep 17 00:00:00 2001
From: Max Rees <maxcrees@me.com>
Date: Tue, 3 Mar 2020 13:44:15 +0000
Subject: user/libgd: patch CVE-2018-14553 (#240)

---
 user/libgd/CVE-2018-14553.patch | 99 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 user/libgd/CVE-2018-14553.patch

(limited to 'user/libgd/CVE-2018-14553.patch')

diff --git a/user/libgd/CVE-2018-14553.patch b/user/libgd/CVE-2018-14553.patch
new file mode 100644
index 000000000..7510101d1
--- /dev/null
+++ b/user/libgd/CVE-2018-14553.patch
@@ -0,0 +1,99 @@
+From a93eac0e843148dc2d631c3ba80af17e9c8c860f Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?F=C3=A1bio=20Cabral=20Pacheco?= <fcabralpacheco@gmail.com>
+Date: Fri, 20 Dec 2019 12:03:33 -0300
+Subject: [PATCH] Fix potential NULL pointer dereference in gdImageClone()
+
+---
+ src/gd.c                          |  9 +--------
+ tests/gdimageclone/CMakeLists.txt |  1 +
+ tests/gdimageclone/Makemodule.am  |  3 ++-
+ tests/gdimageclone/style.c        | 30 ++++++++++++++++++++++++++++++
+ 5 files changed, 35 insertions(+), 9 deletions(-)
+ create mode 100644 tests/gdimageclone/style.c
+
+diff --git a/src/gd.c b/src/gd.c
+index 592a0286..d564d1f9 100644
+--- a/src/gd.c
++++ b/src/gd.c
+@@ -2865,14 +2865,6 @@ BGD_DECLARE(gdImagePtr) gdImageClone (gdImagePtr src) {
+ 		}
+ 	}
+ 
+-	if (src->styleLength > 0) {
+-		dst->styleLength = src->styleLength;
+-		dst->stylePos    = src->stylePos;
+-		for (i = 0; i < src->styleLength; i++) {
+-			dst->style[i] = src->style[i];
+-		}
+-	}
+-
+ 	dst->interlace   = src->interlace;
+ 
+ 	dst->alphaBlendingFlag = src->alphaBlendingFlag;
+@@ -2907,6 +2899,7 @@ BGD_DECLARE(gdImagePtr) gdImageClone (gdImagePtr src) {
+ 
+ 	if (src->style) {
+ 		gdImageSetStyle(dst, src->style, src->styleLength);
++		dst->stylePos = src->stylePos;
+ 	}
+ 
+ 	for (i = 0; i < gdMaxColors; i++) {
+diff --git a/tests/gdimageclone/CMakeLists.txt b/tests/gdimageclone/CMakeLists.txt
+index e6ccc318..662f4e96 100644
+--- a/tests/gdimageclone/CMakeLists.txt
++++ b/tests/gdimageclone/CMakeLists.txt
+@@ -1,5 +1,6 @@
+ LIST(APPEND TESTS_FILES
+ 	bug00300
++	style
+ )
+ 
+ ADD_GD_TESTS()
+diff --git a/tests/gdimageclone/Makemodule.am b/tests/gdimageclone/Makemodule.am
+index 4b1b54c0..51abf5c1 100644
+--- a/tests/gdimageclone/Makemodule.am
++++ b/tests/gdimageclone/Makemodule.am
+@@ -1,5 +1,6 @@
+ libgd_test_programs += \
+-	gdimageclone/bug00300
++	gdimageclone/bug00300 \
++	gdimageclone/style
+ 
+ EXTRA_DIST += \
+ 	gdimageclone/CMakeLists.txt
+diff --git a/tests/gdimageclone/style.c b/tests/gdimageclone/style.c
+new file mode 100644
+index 00000000..c2b246ed
+--- /dev/null
++++ b/tests/gdimageclone/style.c
+@@ -0,0 +1,30 @@
++/**
++ * Cloning an image should exactly reproduce all style related data
++ */
++
++
++#include <string.h>
++#include "gd.h"
++#include "gdtest.h"
++
++
++int main()
++{
++    gdImagePtr im, clone;
++    int style[] = {0, 0, 0};
++
++    im = gdImageCreate(8, 8);
++    gdImageSetStyle(im, style, sizeof(style)/sizeof(style[0]));
++
++    clone = gdImageClone(im);
++    gdTestAssert(clone != NULL);
++
++    gdTestAssert(clone->styleLength == im->styleLength);
++    gdTestAssert(clone->stylePos == im->stylePos);
++    gdTestAssert(!memcmp(clone->style, im->style, sizeof(style)/sizeof(style[0])));
++
++    gdImageDestroy(clone);
++    gdImageDestroy(im);
++
++    return gdNumFailures();
++}
-- 
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